To become a mediator, you must attend a mediation training course.

The following organisations offer CMC Registered training courses which can lead to CMC Registered status (see here [link] for all of the registration requirements).

Academy of Experts
ADR-ODR International
ADR Group
Align Mediation (though not the distance learning course)
BIMA
CEDR
Clear ADR
Globis Mediation Group
Hunt ADR
London School of Mediation
M & D Associates
National Dispute Resolution
Phoenix Dispute Solutions
ProMediate
Royal Institute of Chartered Surveyors (RICS)
SCMA Ltd
Society of Mediators
University of Central Lancashire